Izvorni znanstveni članak
Electrochemical and quantum chemical parameters of (-)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-pipera-zinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acidas anti-corrosive agent for API 5L X-52 steel
Fidelis E. Abeng
; Material and Electrochemistry Research Group, Department of Chemistry, Cross River University of Technology, Calabar, P. M. B 1123 Calabar, Nigeria
Magdalene E. Ikpi
; Corrosion and Electrochemistry Research Laboratory, Department of Pure and Applied Chemistry, University of Calabar, P.M.B. 1115 Calabar, Nigeria
Victor E. Okpashi
; Department of Biochemistry, Cross River University of Technology, P. M. B.1123 Calabar, Nigeria
Onumashi A. Ushie
; Department of Chemical Science, Federal University Wukari, Nigeria
Mbang E. Obeten
; Material and Electrochemistry Research Group, Department of Chemistry, Cross River University of Technology, Calabar, P. M. B 1123 Calabar, Nigeria
Sažetak
The inhibitive action of (-)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7- -oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (Levaquin) on API 5L X-52 steel in 2 M HCl solution was investigated using potentiodynamic polarization method and quantum chemical study. Levaquin drug showed good inhibition efficiency of 88 and 95 % at 303 and 323 K, respectively. The results of experimental measurements revealed that Levaquin drug works as a mixed type inhibitor. Langmuir thermodynamic model was tested to describe the mode of inhibitor adsorption on the steel surface. The quantum chemical calculations confirmed the efficacy of Levaquin drug as a corrosion inhibitor.
Ključne riječi
Corrosion; density functional theory; potentiodynamic polarization; organic inhibitor; adsorption
Hrčak ID:
238090
URI
Datum izdavanja:
19.5.2020.
Posjeta: 648 *